<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of this paper was to analyze theoretical aspects of calculating steady water flow through unsubmerged circular orifices. Theoretical analysis shows that the values of discharge obtained by using formulas intended for small orifices are greater than those calculated using formulas for large orifices. These differences attain a maximum value when the water level reaches the upper edge of the orifice, and decrease when water head increases. It has been proven that the volumetric flow rate for circular unsubmerged orifices can be calculated by formulas for small orifices when the water level above the center of gravity is at least four times as high as the diameter of the orifice.</p></abstract>

The aim of this paper was to analyze theoretical aspects of calculating steady water flow through unsubmerged circular orifices. Theoretical analysis shows that the values of discharge obtained by using formulas intended for small orifices are greater than those calculated using formulas for large orifices. These differences attain a maximum value when the water level reaches the upper edge of the orifice, and decrease when water head increases. It has been proven that the volumetric flow rate for circular unsubmerged orifices can be calculated by formulas for small orifices when the water level above the center of gravity is at least four times as high as the diameter of the orifice.

Assessment of Equivalence of Small and Large Orifice Computational Models

Warsaw University of Technology Faculty of Environmental Engineering, Poland

Archives of Hydro-Engineering and Environmental Mechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Assessment of Equivalence of Small and Large Orifice Computational Models"}

The aim of this paper was to analyze theoretical aspects of calculating steady water flow through unsubmerged circular orifices. Theoretical analysis shows...

Assessment of Equivalence of Small and Large Orifice Computational Models

Published Online: Mar 17, 2016

Page range: 67 - 76

Received: May 11, 2015

DOI: https://doi.org/10.1515/heem-2015-0020

Keywords
orifice, velocity, flow, computational models

© 2015 Michał Kubrak, published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Assessment of Equivalence of Small and Large Orifice Computational Models

Published Online: Mar 17, 2016

Page range: 67 - 76

Received: May 11, 2015

DOI: https://doi.org/10.1515/heem-2015-0020

Keywordsorifice, velocity, flow, computational models

© 2015 Michał Kubrak, published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
orifice, velocity, flow, computational models